Granted Patent
Utility
US 5,525,257 · App. 08/320,004
Composition for water treatment containing polyaspartic acidora derivative thereof and a polcarboxylic acid and methods of using the composition
Inventors:
Roland Kleinstuck, Hermann Sicius, Torsten Groth, Winfreid Joentgen
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Oct 7, 1994
Inventors
Roland Kleinstuck
Hermann Sicius
Torsten Groth
Winfreid Joentgen
Assignee (at issue)
Bayer Aktiengesellschaft
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.